Download Jasmine Concerto KT88-PP Tube Integrated Amplifier Owner`s Manual

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Jasmine Concerto KT88-PP
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Tube Integrated Amplifier
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Owner’s Manual
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Safety Precautions _______________
To get the best performance from your Jasmine KT88-PP Tube
Integrated Amplifier, and for your own safety, please read and
follow these important safety instructions:
Never place the Jasmine KT88-PP Tube Integrated Amplifier near
heat sources such as radiators, fireplaces, stoves, or other
appliances that produce heat. Avoid placing the Jasmine KT88-PP
Tube Integrated Amplifier where it will be subject to direct
sunlight or low temperatures.
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The Tubes will be running with very high temperature,
never touch the tubes when the amplifier is running. Please keep
the tube cover fixed when you use it.
AC extension cords are not recommended for use with
this product. If an extension cord must be used, be sure it is an
approved type and has sufficient current carrying capacity for
this product.
Before cleaning the Jasmine KT88-PP Tube Integrated
Amplifier, always disconnect the power supply cord. Use a soft
cloth and, if necessary, dampen with clean water or mild cleaning
agent. Never apply water, or any other cleaner, directly to the
chassis.
If you smell smoke or an abnormal smell, immediately
unplug the Jasmine KT88-PP Tube Integrated Amplifier from the
power supply and contact your Jasmine dealer.
Never attempt to service the Jasmine KT88-PP Tube
Integrated Amplifier beyond what is described in this Owner’s
Manual. Qualified service personnel should perform all repairs.
Unplug unit if it becomes wet.
Do not open unit when attached to AC outlet;
dangerous voltages may be encountered.
Replace fuse only with the exact type originally
included.
Don’t upgrade the tubes by yourself whatsoever, or the
warranty is immediately voided. Incorrect upgrading will
degrade the sound quality or burn down the amplifier. If you like
to upgrade the tubes, please contact the Jasmine dealer.
Contents _______________________
Safety Precautions
2
Introduction
4
A Brief of Jasmine
The Design Philosophy of jasmine
Installation
5
Unpacking
The Accessory Kit
Installing Tubes
Choosing a Location for the Jasmine Amplifier
Connections
7
Connecting to AC Power
Connecting to the Signal Source
Connecting to the Speakers
Operation
9
Before Power on the Amplifier
Choosing your Signal Source
Adjusting the brightness of the tube cover
Power On & Off Sequence
How to adjust the bias-voltage
10
Why need to upgrade or exchange the tubes ?
The Exchangeable Tube Type
Step One: Exchanging the Tubes
Step Two: Power on the Amplifier
Step Three: Adjusting Bias-Voltage of the Tubes
Warranty
13
Specifications
14
Introduction _______________________
All of us at Jasmine would like to offer thanks and
congratulations to you for purchasing the Jasmine
KT88-PP Tube Integrated Amplifier. We sincerely
believe that your Jasmine KT88-PP Tube Integrated
Amplifier is an intelligent purchase decision that will
bring you many years of musical pleasure and
satisfaction. While every new owner is anxious to begin
listening, we encourage you to take a few minutes to
read this manual and familiarize yourself with the full
capabilities of the Jasmine KT88-PP Tube Integrated
Amplifier.
To reduce the risk of injury or damage to your Jasmine
KT88-PP Tube Integrated Amplifier, please read the
safety instructions on the first page of this manual. In
addition, please pay particular attention to the sections
of this manual where the symbol at left is shown.
A Brief History of Jasmine
Jasmine Audio was established by a group of
professional audiophile with the pure passion for the
perfection of sound in 2001. The result of this passion is
products with marvellous and smooth dynamic sound
combined with innovative design. No detail on a
Jasmine product is left unattended, and experienced
and qualified engineers handpick all components.
Owning a Jasmine product should be seen as being part
of a very special “club”, created by enthusiasts for
enthusiasts.
The Design Philosophy of Jasmine
Pure,
Simple,
Nature !
Installation _______________________
This section includes information on how to unpack
and position your Jasmine KT88-PP Tube Integrated
Amplifier.
Unpacking
After carefully unpacking your Jasmine KT88-PP Tube
Integrated Amplifier, inspect for any shipping damage
and call your dealer immediately if any is found. Do not
plug your Jasmine KT88-PP Tube Integrated Amplifier
into any outlet if you find shipping damage.
Please save all packing materials so the unit can be
easily and safely shipped if the need arises.
The Accessory Kit
Included in the carton, you will find an accessory kit
that contains the following:
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Four KT88 tubes
Four 12AU7 tubes
AC power cord
One pair of gloves
Installing Tubes
Each tube is labeled, such as V1, V2, … etc. The same
label also appeared on the top side of the amp.
First of all, place the amp on a solid place, then remove
the tube cover by the screw driver. Unpacking the
tubes, and plug in the according slots.
The tubes are tested and strictly matched before
packing in the factory. To be sure you have plug the
tubes in the right place before powering on the amp.
Otherwise, will reduce the sound quality.
After all tubes are installed, Please re-fixed the tube
cover.
Choosing a Location for the Jasmine Amplifier
The sound quality of all high-performance digital and
analog components can be degraded by vibration.
Although the Jasmine KT88-PP Tube Amplifier uses
some of the most advanced noise-reduction circuitry
available, it too will benefit from any efforts taken to
reduce vibration. For best performance, place the
Jasmine KT88-PP Tube Amplifier on a solid,
non-resonant shelf.
Connections _______________________
This section provides instructions to connect the
Jasmine KT88-PP Tube Amplifier to the rest of your
music system. Below is an illustration of the Jasmine
KT88-PP Tube Amplifier rear panel, showing all inputs
and outputs.
Right SP
Voltage Mode
Terminals
Switch
Input Connectors
Left SP
Terminals
AC Inlet
Avoid allowing static shocks to be applied to the inputs
or outputs. To prevent static shocks, touch any
grounded surface, such as the chassis of a component
that is plugged into an AC socket, before connecting or
removing a cable.
Inputs and outputs can be safely connected to the
Jasmine KT88-PP Tube Amplifier when the AC power
is switched off.
Connecting to AC Power
Check to make sure your Jasmine KT88-PP Tube
Amplifier has been set for operation at your AC line
voltage. Attempting to use your Jasmine KT88-PP Tube
Amplifier at any voltage other than that specified on the
rear of the unit may cause damage that is not covered
by Jasmine’s warranty.
Jasmine AC Power Mode:
The 230V mode is suitable for using in 220 ~ 240V
voltage environment.
The 115V mode is suitable for using in 110 ~ 120V
voltage environment.
Break-in and warm-up
Careful listeners will notice that the sound of the
Jasmine KT88-PP Tube Amplifier improves steadily
after the unit is powered-up. A new unit will undergo
more dramatic changes when power is applied for the
first time. Depending on the resolution of the system
and the attentiveness of the listener, you may find that
the sound continues to improve over the first several
weeks of operation. If the power is disconnected for a
period of an hour or more, the unit will undergo similar
but less dramatic break-in.
Connecting to the Signal Sources
You can directly connect your CD player, Tuner to the
Jasmine KT88-PP Tube Amplifier. But Turntable, You
have to connect your turntable to the Jasmine KT88-PP
Tube Amplifier by a phono stage , except your
turntable embedded phono stage inside.
Connecting to the Speakers
The tube amplifier is sensitive to the output impedance.
The Jasmine KT88-PP Tube Amplifier supply two sets
of speaker terminals for using, 4 ohm and 8 ohm. Please
refer to the impedance parameters of your speakers
before connecting and choose the right terminals for
connecting your speaker cable. If the impendence of
your speaker is 6 ohm, please choosing 8 ohm terminals
for connecting.
Operation _______________________
This section describes how to operate the Jasmine
KT88-PP Tube Amplifier.
Before Power On the Amplifier
To make sure the volume switch is turned to the
minimum position before you turn on the power
switch !
Please power on your signal source devices before turn
on your Jasmine KT88-PP Tube Amplifier.
Choosing your signal source
Through the Selector switch on the front panel, you can
select the signal source that you like, such as CD Player,
Tuner, or turntable, … etc.
Adjusting the brightness of the tube cover
Through the Dimmer switch on the rear panel, you can
adjust the brightness of the top acrylic cover.
Powering On & Off Sequence
The correct power-on and power-off sequence will
lengthen the life of your HI-FI system.
Power On Sequence
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Signal Sources --> Integrated Amplifier.
Power Off Sequence
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Integrated Amplifier--> Signal Sources
How to adjust Bias-Voltage_____________
After you exchange the power tubes ( like 6550, KT88 ),
you have to adjust the bias-voltage again.
The recommended Bias-Voltage is 0.50V ! Never over
0.52V, will cause the power tube burned down.
Why need to upgrade or exchange the tubes ?
The lifetime of vacuum tube depend on the quality and
used hours each day. Usually, one set of tubes can be
used for 3 ~ 5 years. After you used Jasmine KT88-PP
for several years and find the sound quality degraded
markedly. It’s time for exchanging the tubes.
Some times, Audiophile like to change the different
brand of tube to obtain different sound.
The Exchangeable Tube Type
KT88 = 6550
12AU7 = ECC82=E82CC
The tubes are must pairs matched at least. The best is
four tubes matched each other.
Step One: Exchanging the Tubes
1. Power off your Jasmine KT88-PP Tube Integrated
Amplifier
2. Waiting for the tubes cooling down to the safety
temperature, pull off the tubes
3. Plug in the new tubes, V1 and V2 is one pair, V3 and
V4 is another pair. For the preamp tubes, V5 and V6
is one pair, V7 and V8 is another pair.
4. If you only exchanged preamp tubes (V5 ~ V8), the
exchanging operation is finished. No necessary to
execute following steps !
Step Two: Power on the amplifier
1. Before power on the Jasmine KT88-PP, be sure the
speaker cables are connected!
2. Carefully turn on the power switch, waiting for 5
minutes till the tubes warmed up.
3. Using a multi-meter, setting to direct voltage 20V
model
4. Finding out the adjusting switchs
Here is it !
Step Three: Adjusting Bias-Voltage of the Tubes
1. Connecting the negative pole of the multi-meter to
the zero ohm speaker terminal, and find out the test
point behind each KT88 tube.
Ne ga tive
Pole
Te st
Point
2. Using a small screw-driver to slowly adjust the
adjust switcher, till the test voltage reach the 0.45V
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Repeating the steps above for each power tube. Please
keep in mind for that the bias voltage of each tube is
best at same level.
Congratulation! You just updated your Jasmine Piano
KT88-PP Tube Amplifier!
Warranty _______________________
Jasmine warrants that Jasmine products shall be free
from defects in materials and workmanship for:
One year for parts and labor, except tubes
The warranty period begins at the date of retail sale by
an authorized Jasmine dealer and is subject to the
following requirements and understandings:
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This is a non-transferable warranty applicable to the
original purchaser exclusively.
The product must not have been modified in any
manner whatsoever, or the warranty is immediately
voided.
The product must not have been stored in humid
environment; nor subjected to weather, water, or
salt spray.
During the warranty period Jasmine will repair the
product to working order, or, at Jasmine’s option,
replace the defective equipment with a similar
available product, at no cost to the owner for the
labor, materials, and return shipping from Jasmine.
Jasmine shall not, under any circumstances, be
liable for any incidental or consequential damages
arising from the loss of property or other damage or
losses due to the failure of a Jasmine product.
Jasmine will not pay for loss of use or
inconvenience caused by the failure of a Jasmine
product. Jasmine will not pay for damage caused to
other audio components because of the failure of a
Jasmine product within the limits allowed by State
Law.
All repairs performed after the warranty period has
expired will be billed to the owner and will carry a
90 day warranty on parts and labor.
The customer is responsible for shipping the unit to
Jasmine.
Jasmine product is only warranted in the country of
original sale.
Specifications _______________________
Output power:
50W x 2
Tubes used:
4 x KT88 , 4 x 12AU7
Input Impedance:
100K ohm
Output Impedance:
4 , 8 ohm
Input ports:
3 sets of RCA
S/N:
> 90dB
Freq. Response:
6Hz ~ 45KHz ( +/-1.5dB )
THD:
< 1%
Voltage Model:
110 ~120V / 50~60Hz or 220 ~ 240V/
50~60Hz
Net Weight:
23Kg
Size:
430(W) x 410(D) x 200(H) mm
Power Consumption:
200W (static status)
@ 2006 Jasmine audio
Block B1-5C, Digital Tech. Park,
Southern Keji Rd.,
Shenzhen, GD,
China 518057
Subject to change without notice.